Diseases
Helianthus annuus L.
A fungal disease of sunflower caused by Phoma macdonaldii (Leptosphaeria lindquistii), affecting all vegetative organs and flower heads. It is characterized by the appearance of necrotic spots, which on stems take on a distinctive blue-black color with a metallic sheen.
In the reference 479 varieties crop Sunflower, where this is mentioned in the description.
The pathogen of the disease is the fungus Phoma macdonaldii, which also has an ascomycete stage of development, Leptosphaeria lindquistii. Symptoms appear on leaves at the 3–4 pair of true leaves stage as brown spots with a yellow margin, which spread to the stem through the petioles. At the points of petiole attachment, large dark brown or blue-black necroses occur, which can girdle the stem and lead to a loss of tissue integrity.
Infection of the flower heads manifests as the appearance of brown spots on their dorsal side, which leads to the formation of shriveled seeds or their complete underdevelopment. In sunflower breeding, there are no lines with complete genetic resistance to the pathogen, so work is carried out exclusively in the direction of selecting tolerant hybrids based on the evaluation of their phenotypic response under conditions of natural or artificial inoculation.
General information about the subject — on the page Phoma rot.
Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.
Helianthus annuus L. · Sunflower
Tovarystvo z obmezhenoiu vidpovidalnistiu «TK ART-AHRO»
Helianthus annuus L. · Sunflower
Malinovskyi Serhii Volodymyrovych
Helianthus annuus L. · Sunflower
Kyrychenko Maryna Serhiivna, Babych Viktoriia Olehivna, Parii Myroslav Fedorovych, Parii IAroslav Fedorovych,
Helianthus annuus L. · Sunflower
Euralis Semences
Helianthus annuus L. · Sunflower
Malinovskyi Serhii Volodymyrovych
Helianthus annuus L. · Sunflower
Tovarystvo z obmezhenoiu vidpovidalnistiu "KMK AHRO"
Helianthus annuus L. · Sunflower
Kopylov Serhii Ihorovych
Helianthus annuus L. · Sunflower
Skakunenko, Vladyslava
Helianthus annuus L. · Sunflower
VERNEUIL RECHERCHE
Helianthus annuus L. · Sunflower
APSOVSEMENTI S.P.A.
Helianthus annuus L. · Sunflower
Burlov Viktor Vasylovych
Helianthus annuus L. · Sunflower
Codisem, FR
Helianthus annuus L. · Sunflower
APSOVSEMENTI S.P.A.
Helianthus annuus L. · Sunflower
Berestenko Serhii Leonidovych, Scherban` Serhii Vasyl`ovych, Scherban` Natalia Fedorivna,
Helianthus annuus L. · Sunflower
Euralis Semences
Helianthus annuus L. · Sunflower
Apex (FR)
Helianthus annuus L. · Sunflower
Dobroudja Agricultural Institute - General Toshevo (BG)
Helianthus annuus L. · Sunflower
Karpenko Oleksandr Oleksandrovych, Luk'ianchyk IUrii Ivanovych,
Helianthus annuus L. · Sunflower
Y.-M. Campion
Helianthus annuus L. · Sunflower
SEEDECO Semences SRL (MD)
Helianthus annuus L. · Sunflower
Miklic Vladimir Jocic Sinisa Dusanic NenadSandra Cvejic Milan Jockovic Zaitsev Oleksii Kovalov Volodymyr
Helianthus annuus L. · Sunflower
Reva IAroslav Mykolaiovych
Helianthus annuus L. · Sunflower
Goran Malidza, Sinisa Jocic, Dragan Skoric,
Helianthus annuus L. · Sunflower
Cvejic, Sandra Dusanic, Nenad Jockovic, Milan Miklic, Vladimir Mykhno, Mykola Jocic, Sinisa